OAM.V.VKID.E. ]77 



podiiTiflc of the siiporior; titigellum a^ long as the pedunclo. 

 Gnathopofla alike, suboqual ; first pair a little the smaller : second 

 pair having the propodos subcjuadratc, longer than broad, narrow- 

 est near the cai-pus, broadest at the palm ; inferior margin caiTy- 

 ing four fasciculi of haii's, the largest nearest to the inferior angle 

 of the palm, which is shghtly advanced, and crowned with three 

 or four veiy short spines, and one long stout spine furnished near 

 the tip with a short hair ; pahu slightly waved ; dactylos ha'ving 

 the inner margin corresponding with the palm. Pcreiopoda 

 slender, suboqual, having the dactj'la long and distinctly unguicu- 

 late, each dactylos carrying a small tooth on the internal surface, 

 where it suddenly narrows to the unguis. Antepenultimate pair 

 of plcopoda longer than the penultimate ; ultimate (wanting). 

 Length ^ths of an inch. 



Hah. An old pump in a house at Eingwood, and one very recently 

 dry at Upper Clatford, near Andovcr, Hants {Rev. A. R. Hogan). 



This species, which I received from the discoverer, is named in 

 honour of the celebrated naturalist who first described and figured 

 these pecuHar little Crustacea. 



4. Niphargus puteanus. (Plate XXXII. fig. 4.) 



Gammarus puteanus, Koch, Deutschl. Crust, Mijr. u. Arach. h. 5. n. 2, 

 1835-42. 



Body long and slender. Superior antennas half the length of the 

 animd. Inferior antennae two-thirds the length of the superior. 

 Gnathopoda uniform ; propoda of each pair quadi'ilateral, broader 

 than long, postcro-inferior angle posteriorly produced, antero- 

 inferior rounded ; palm slightly concave and imperfectly defined ; 

 dactylos long and arcuate. Pereiopoda gradually increasing in 

 length posteriorly. Antepenultimate and penultimate pairs of 

 pleopoda not reaching beyond the peduncle of the posterior pair ; 

 posterior pair of pleopoda in the male one-fourth, in the female 

 rather more than one-third the length of the animal. 



Length | an inch. 



Ilah, Draw-wells, Regensbui'g (Koch) ; Poitiers (M. Chierin- 

 MenevUh). 



The description of this animal is taken from the figure given by 

 Koib. and from a tracing from the drawing in M. Guerin-]\I('ne\ille's 

 collection. The only discrepancy in the figures of the two authors 

 consists in a slight difference in the length of the posterior pair of 

 pleopoda, a circumstance that has been regarded as a sexual distinction 

 l)y Scbiodtc. The figure is taken from (Jm-rin-Meneville, as being 

 more correct (anatomically) than that of Koch. Koch has coloured his 



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